Rubbing alcohol makes open wounds sting because it lowers the temperature threshold of heat-detecting VR1 receptors – so much so that your own body heat triggers a burning sensation. – WTF Fun Facts
sting
WTF Fun Fact – NASA Raids Denny’s
NASA’s Office of Inspector General once raided a Denny’s as part of a sting operation to bust a 75 year old woman for possessing and attempting to sell a paperweight containing a moon rock the size of a rice grain. – WTF Fun Facts
Source: https://www.latimes.com/local/lanow/la-me-ln-woman-detained-moon-rock-20170413-story.html
